The fourth season premiere of Entourage takes a behind-the-scenes look at the filming of Medellin on location in Bogota, Colombia. On set, E and Walsh clash over keeping the film on schedule and Billy develops an infatuation with Vince's beautiful Colombian co-star, which becomes disruptive to the production. Meanwhile, Drama tries to angle for a part in the film, and Ari provides color commentary from his L.A. office.